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include ( CheckCXXCompilerFlag )
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###################################################
# Activate C++14
#
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# Uses: target_activate_cpp14(buildtarget)
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###################################################
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function ( target_activate_cpp14 TARGET )
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if ( "${CMAKE_VERSION}" VERSION_GREATER "3.1" )
set_property ( TARGET ${ TARGET } PROPERTY CXX_STANDARD 14 )
set_property ( TARGET ${ TARGET } PROPERTY CXX_STANDARD_REQUIRED ON )
else ( "${CMAKE_VERSION}" VERSION_GREATER "3.1" )
check_cxx_compiler_flag ( "-std=c++14" COMPILER_HAS_CPP14_SUPPORT )
if ( COMPILER_HAS_CPP14_SUPPORT )
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target_compile_options ( ${ TARGET } PRIVATE -std=c++14 )
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else ( COMPILER_HAS_CPP14_SUPPORT )
check_cxx_compiler_flag ( "-std=c++1y" COMPILER_HAS_CPP14_PARTIAL_SUPPORT )
if ( COMPILER_HAS_CPP14_PARTIAL_SUPPORT )
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target_compile_options ( ${ TARGET } PRIVATE -std=c++1y )
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else ( )
message ( FATAL_ERROR "Compiler doesn't support C++14" )
endif ( )
endif ( COMPILER_HAS_CPP14_SUPPORT )
endif ( "${CMAKE_VERSION}" VERSION_GREATER "3.1" )
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# Ideally, we'd like to use libc++ on linux as well, but:
# - http://stackoverflow.com/questions/37096062/get-a-basic-c-program-to-compile-using-clang-on-ubuntu-16
# - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808086
# so only use it on Apple systems...
if ( CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND APPLE )
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target_compile_options ( ${ TARGET } PUBLIC -stdlib=libc++ )
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endif ( CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND APPLE )
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endfunction ( target_activate_cpp14 )
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# Find clang-tidy executable (for use in target_enable_style_warnings)
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if ( USE_CLANG_TIDY )
find_program (
C L A N G _ T I D Y _ E X E
N A M E S " c l a n g - t i d y "
D O C " P a t h t o c l a n g - t i d y e x e c u t a b l e "
)
if ( NOT CLANG_TIDY_EXE )
message ( FATAL_ERROR "clang-tidy not found. Please install clang-tidy or run without -DUSE_CLANG_TIDY=on." )
else ( )
set ( CLANG_TIDY_OPTIONS "-system-headers=0" )
if ( CLANG_TIDY_WARNINGS_AS_ERRORS )
set ( CLANG_TIDY_OPTIONS "${CLANG_TIDY_OPTIONS}" "-warnings-as-errors=*" )
endif ( )
message ( STATUS "Clang-tidy is enabled. Executable: ${CLANG_TIDY_EXE} Arguments: ${CLANG_TIDY_OPTIONS}" )
set ( CLANG_TIDY_CLI "${CLANG_TIDY_EXE}" "${CLANG_TIDY_OPTIONS}" )
endif ( )
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endif ( )
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# Find iwyu (for use in target_enable_style_warnings)
if ( USE_IWYU )
find_program (
I W Y U _ E X E N A M E S
i n c l u d e - w h a t - y o u - u s e
i w y u
)
if ( NOT IWYU_EXE )
message ( FATAL_ERROR "include-what-you-use not found. Please install iwyu or run without -DUSE_IWYU=on." )
else ( )
message ( STATUS "iwyu found: ${IWYU_EXE}" )
set ( DO_IWYU "${IWYU_EXE}" )
endif ( )
endif ( )
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#################################################
# Enable style compiler warnings
#
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# Uses: target_enable_style_warnings(buildtarget)
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#################################################
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function ( target_enable_style_warnings TARGET )
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if ( "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC" )
# TODO
elseif ( "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang" )
target_compile_options ( ${ TARGET } PRIVATE -Wall -Wextra -Wold-style-cast -Wcast-align -Wno-unused-command-line-argument ) # TODO consider -Wpedantic -Wchkp -Wcast-qual -Wctor-dtor-privacy -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Woverloaded-virtual -Wredundant-decls -Wshadow -Wsign-promo -Wstrict-null-sentinel -Wstrict-overflow=5 -Wundef -Wno-unused -Wno-variadic-macros -Wno-parentheses -fdiagnostics-show-option -Wconversion and others?
elseif ( "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" )
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target_compile_options ( ${ TARGET } PRIVATE -Wall -Wextra -Wold-style-cast -Wcast-align -Wno-maybe-uninitialized ) # TODO consider -Wpedantic -Wchkp -Wcast-qual -Wctor-dtor-privacy -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Woverloaded-virtual -Wredundant-decls -Wshadow -Wsign-promo -Wstrict-null-sentinel -Wstrict-overflow=5 -Wundef -Wno-unused -Wno-variadic-macros -Wno-parentheses -fdiagnostics-show-option -Wconversion and others?
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endif ( )
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if ( USE_WERROR )
target_compile_options ( ${ TARGET } PRIVATE -Werror )
endif ( )
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# Enable clang-tidy
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if ( USE_CLANG_TIDY )
set_target_properties (
$ { T A R G E T } P R O P E R T I E S
C X X _ C L A N G _ T I D Y " $ { C L A N G _ T I D Y _ C L I } "
)
endif ( )
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if ( USE_IWYU )
set_target_properties (
$ { T A R G E T } P R O P E R T I E S
C X X _ I N C L U D E _ W H A T _ Y O U _ U S E " $ { D O _ I W Y U } "
)
endif ( )
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endfunction ( target_enable_style_warnings )
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##################################################
# Add boost to the project
#
# Uses:
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# target_add_boost(buildtarget) # if you're only using header-only boost libs
# target_add_boost(buildtarget system filesystem) # list all libraries to link against in the dependencies
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##################################################
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function ( target_add_boost TARGET )
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# Load boost libraries
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if ( NOT DEFINED Boost_USE_STATIC_LIBS OR Boost_USE_STATIC_LIBS )
# Many supported systems don't have boost >= 1.56. Better link it statically.
message ( STATUS "Boost will be statically linked" )
set ( Boost_USE_STATIC_LIBS ON )
else ( NOT DEFINED Boost_USE_STATIC_LIBS OR Boost_USE_STATIC_LIBS )
message ( STATUS "Boost will be dynamically linked" )
set ( Boost_USE_STATIC_LIBS OFF )
endif ( NOT DEFINED Boost_USE_STATIC_LIBS OR Boost_USE_STATIC_LIBS )
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set ( BOOST_THREAD_VERSION 4 )
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find_package ( Boost 1.56.0
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R E Q U I R E D
C O M P O N E N T S $ { A R G N } )
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target_include_directories ( ${ TARGET } SYSTEM PUBLIC ${ Boost_INCLUDE_DIRS } )
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target_link_libraries ( ${ TARGET } PUBLIC ${ Boost_LIBRARIES } )
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target_compile_definitions ( ${ TARGET } PUBLIC BOOST_THREAD_VERSION=4 )
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if ( ${ CMAKE_SYSTEM_NAME } MATCHES "Linux" )
# Also link to rt, because boost thread needs that.
target_link_libraries ( ${ TARGET } PUBLIC rt )
endif ( ${ CMAKE_SYSTEM_NAME } MATCHES "Linux" )
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endfunction ( target_add_boost )
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##################################################
# Specify that a specific minimal version of gcc is required
#
# Uses:
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# require_gcc_version(4.9)
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##################################################
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function ( require_gcc_version VERSION )
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if ( CMAKE_COMPILER_IS_GNUCXX )
execute_process ( COMMAND ${ CMAKE_CXX_COMPILER } -dumpversion OUTPUT_VARIABLE GCC_VERSION )
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if ( GCC_VERSION VERSION_LESS ${ VERSION } )
message ( FATAL_ERROR "Needs at least gcc version ${VERSION}, found gcc ${GCC_VERSION}" )
endif ( GCC_VERSION VERSION_LESS ${ VERSION } )
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endif ( CMAKE_COMPILER_IS_GNUCXX )
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endfunction ( require_gcc_version )
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##################################################
# Specify that a specific minimal version of clang is required
#
# Uses:
# require_clang_version(3.5)
##################################################
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function ( require_clang_version VERSION )
if ( CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
if ( CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${ VERSION } )
message ( FATAL_ERROR "Needs at least clang version ${VERSION}, found clang ${CMAKE_CXX_COMPILER_VERSION}" )
endif ( CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${ VERSION } )
endif ( CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
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endfunction ( require_clang_version )
##################################################
# Find the location of a library and return its full path in OUTPUT_VARIABLE.
# If PATH_VARIABLE points to a defined variable, then the library will only be searched in this path.
# If PATH_VARIABLE points to a undefined variable, default system locations will be searched.
#
# Uses (the following will search for fuse in system locations by default, and if the user passes -DFUSE_LIB_PATH to cmake, it will only search in this path.
# find_library_with_path(MYLIBRARY fuse FUSE_LIB_PATH)
# target_link_library(target ${MYLIBRARY})
##################################################
function ( find_library_with_path OUTPUT_VARIABLE LIBRARY_NAME PATH_VARIABLE )
if ( ${ PATH_VARIABLE } )
find_library ( ${ OUTPUT_VARIABLE } ${ LIBRARY_NAME } PATHS ${ ${PATH_VARIABLE } } NO_DEFAULT_PATH )
if ( ${ OUTPUT_VARIABLE } MATCHES NOTFOUND )
message ( FATAL_ERROR "Didn't find ${LIBRARY_NAME} in path specified by the ${PATH_VARIABLE} parameter (${${PATH_VARIABLE}}). Pass in the correct path or remove the parameter to try common system locations." )
else ( ${ OUTPUT_VARIABLE } MATCHES NOTFOUND )
message ( STATUS "Found ${LIBRARY_NAME} in user-defined path ${${PATH_VARIABLE}}" )
endif ( ${ OUTPUT_VARIABLE } MATCHES NOTFOUND )
else ( ${ PATH_VARIABLE } )
find_library ( ${ OUTPUT_VARIABLE } ${ LIBRARY_NAME } )
if ( ${ OUTPUT_VARIABLE } MATCHES NOTFOUND )
message ( FATAL_ERROR "Didn't find ${LIBRARY_NAME} library. If ${LIBRARY_NAME} is installed, try passing in the library location with -D${PATH_VARIABLE}=/path/to/${LIBRARY_NAME}/lib." )
else ( ${ OUTPUT_VARIABLE } MATCHES NOTFOUND )
message ( STATUS "Found ${LIBRARY_NAME} in system location" )
endif ( ${ OUTPUT_VARIABLE } MATCHES NOTFOUND )
endif ( ${ PATH_VARIABLE } )
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endfunction ( find_library_with_path )
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include ( cmake-utils/TargetArch.cmake )
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function ( get_target_architecture output_var )
target_architecture ( local_output_var )
set ( ${ output_var } ${ local_output_var } PARENT_SCOPE )
endfunction ( )